Daniel scott



. D. SCOTT. GHIMNEY UOWL.

(No Model.)

No. 563,890; Patented July 14, 1896.v

UNITED STATES PATENT Orrrcn.

DANIEL SCOTT, OF BROOKLYN, NEW YORK, ASSIGNOE OF ONE-HALF TO HENRY O.BECKER, OF NElV YORK, N. Y.

CHIMNEY-CGWL.

SPECIFICATION forming part of Letters Patent No. 563,890, dated July 14,1896.

Application filed January 14, 1896. Serial No. 575,507. (No model.)

To all whom it may concern.-

Be it known that I, DANIEL SCOTT, of Brooklyn, in the county of Kingsand State of New York, have invented a new and useful Improvement inChimney-Cowls, of which the following is a specification.

My invention relates to an improvement in chimney-cowls with the objectin view of preventing down or back draft, whatever be the direction orforce of the wind, and for causing the currents of air which strike orpass through the cow]. to assist the upward draft in the chimney or pipeto which the cowl is attached.

In the accompanying drawings, Figure 1 represents the cowl in sideelevation seated upon the top of a chimney-or pipe as in use, and Fig. 2represents a vertical central sec tion through the same.

At the bottom of the cowl there is a socketpiece A, which is made ofsuch size and shape as to closely fit the top of the pipe or chimney B,to which the cowl is to be applied. It is here shown as of cylindricalform to fit a cylindrical pipe or chimney; but it may be made square orcurved or polygonal shape in transverse section, as may be required.

To the supporting socket-piece A the lower section A of the body of thecowl is secured. The section A consists of a frustum of a cone (1, withi ts sides diverging as they extend downwardly to a point at or aboutthe horizontal plane of the top of the socket-piece A, and a shorterfrustum of a cone a, having its base coincident with the base of thefrustum a and having its sides converging as they extend downwardlyaround the upper portion of the socket-piece A. The section A ispreferably made with its top about the diameter of the top of thesocket-piece A, and as its sides extend downwardly they diverge, leavinga considerable space between them and the wall of the section A at thelargest portion, and the sides then gradually converge, but notsufficiently to prevent a free open spacebetween the lower end of thesection A and the exterior of the socket-piece A for the discharge ofthe aircurrents.

The upper section A of the body of the cowl is supported upon the lowersection A and made up of frustums of cones, the uptum and the lowersection a having its topcoincident with the smaller end of the upperportion a and its bottom overlapping and spaced from the top of thesection A.

The upper section A of the body of the cowl is surmounted by a top C ofdouble conical form, the two cones c and c, which form it,havin g theirbases coincident, and the whole being spaced from and fixed a shortdistance above the top of the section A.

To prevent the water which passes down the sides of the cone 0 frombeing directed down underneath the cone 0 and finally dripping from itsapex through the cowl into the pipe or chimney, I provide at or near thepc riphery of the top C an annular recess 0 on the under side of thetop, which causes the.

water to be carried from the extreme margin of the top.

To prevent a current of air, which may from any cause he directed upalong the pipe or chimney B, from entering the bottom of the lowersection A and thereby interfering with the discharge of theair-currents, I provide the socket-piece A with an annular flange orshield D, located at a short distance below the bottom of the section A.

In use the currents of air which strike the cowl from any direction in ahorizontal plane are discharged therefrom, after passing through thecowl, in such a direction as to prevent any back draft in the chimney orpipe B and in such a direction as to tend to produce a vacuum in said pipe,and hence increase the upward draft. For instance, suppose the air toenter beneath the top 0, coming from a direction denoted by the arrow X.After entering the interior of the cowl the air will be subdivided, agreater portion of it passing out of the cowl between the sections A andA and the remainder passing out atthe bottom of the section A", asindicated by the arrows.

I prefer to make the flan go or shield D somewhat downwardly inclined,in order that the current of air passing down the exterior of thefrustum a may not have a tendency to be drawn into the lower end of thesection A.

hat I claim is- A chimney-cowl, consisting of an upper and lower sectioneach section haviu g the general form of two frustums of a cone, thefrustunls of the upper section having their smaller ends coincident andthe frustums of the lower section having their larger ends coincident,the upper section having its lower end spaced from and arranged tooverlap the upper end of the lower section, 2t top spaced from and fixedin position above the upper of said sections and a socket-piece havingits periphery spaced from the lower end of the lower frustnm and havingits upper end at or near the horizontal plane of the meeting ends of thefrusturns comprising the lower section, substantially as set forth.

DANIEL SCOTT. WVitnesses:

FREDK. HAYNES, IRENE B. DECKER.

